Amos f



A. F. LANIER.

JACK. I APPLICATION FILED JUNE 4. 1920.

Patented Aug. 15, 1922,.

in drawings, in which UNITED 'STATESQP'ATENT OFFICE.

Amos r. LAN-IE3, or WORCESTER, massacnusn'rrs,nssieuoa, BY vinsNE AssIGN- MENTS T0 HI-Lo-JAox COMPANY, A CORPORATION or MASSACHUSETTS.

JACK.

1,426,201. l: 1 Application filed June 4,

To all whom it may concern: Be it known that I, AMos F. LANIER, a citizen of the United States, residing atNVorcester, in the county of Worcester and-State of Massachusetts, have invented a new and useful Jack, of which the following is aspecification. i

This invention relates to a jack of the lazy tongs types, Y

The principal objects of the invention are to provide a convenient and comparatively inexpensive stabilizing device that will effectively prevent the rocking of the jack in either direction endwise, and restrict all tendency toward such action; to provide it in such form that it can be assembled readily and inexpensively and to provide improvements in the details of construction by which these advantages are secured.

Reference is to be had to the accompanyig. 1 is a side View of a jack constructed accordance with this invention; Fig.- 2 1s a plan;

Fig. 3 1s a horizontal sectional" view on the .,.1ine.3.3 of Fig. 1 on enlarged scale; and

- to work absolutely Fig. 4 is an enlargedfront view of one bearing and itssupport.

Thisinvention, as stated, relates to that type of jack in which the principle of the lazy tongs is employed, and more specifi-- cally to that type in which gear teeth, or some equivalent thereof, are used at the meetingends of the arms to prevent the rocking of the jack and cause the arms on both sides in. unison independently of the location of the load on strain. These jacks have proved very practical in operation, having a wide range of motion and a strong, construction-and high lifting power.

The invention is shown in a form comprising a-base 1O nearone end of which is mounted a bracketll and near the center of which is mounted a corresponding bracket 12. These brackets are shown as riveted to the base; It will be 'noted that the base 10 ex tends beyond thesupport for the jack which consists of the brackets 11 and 12. Thisextension is on one side only and on the right hand side looking at it from the direction in which power is applied as will appear. This is to sidewise when turning the crank to lift a heavy load. A 7

These two brackets 11 and 12 constitute opposite Walls, each provided with two cir- Specification of Letters Patent.

.tegral, but permissibly means of a square hole through the gear.-

prevent the rocking over of the'jack Patented Aug. 15, 1922. 1920. Serial No. 386,519.

cular recesses 13 cut all the way through them and with vertical slots 141 narrower than these recesses and extending down from the top edges of these-brackets centrally into of the parts and the w each of the recesses 13 and that the cylin drical end of asquare each of these rings. Each of these shafts 16 is shown as provided with a square portion on which is a gear segment 17 preferably in-- mounted on it by shaft 15 extends into These gear segments can be formed integral with the shaft in each case if desired or otherwise fixed firmly'thereon. One advantage of this invention lies in the fact that only two pairs of gear segments are required, one at the top and one at the bottom instead of four pairs'as usually has been the case heretoforex I Each of the shafts 15 carries at each end I an arm 20. Each arm 1S provided with a square hole 21 in which the shaft'fits and with which it must turn. Thc 'gear segments being geared together, the twoni'ms side must move together. These parts are duplicated at the top as will be obvious. The two arms 20 on each side are pinned together by pins 22 or the like, and provided with'a connection 23 at the extreme ends for upper pair ofarms 24:, which are the same as the arms 20 and connected in thcsame way.

Extending across between the ends of the arms is a double threaded right and left hand screw 25 having a square end 26 for the reception of an extension is well understood in this art. The two pairs of arms on each side and the opposite ends of the screwar'e connected together in each case by a .nut 23 which has studs 27 from it on which the arms are pivoted.

The stabilizing device at the top is a duplicate of that at the bottom and the parts are connected up by a load support 30 formed of one piece of die-pressed metal and having the recesses 13, slots 14 and rings 15 for the shafts 16 just as is the case at the bottom. The slots and recesses are cut out in the diepressing operations ch the base and load supporting cap are manufactured.

wrench or crank as In assembling the device, the base, with V the parts 10, 1 1 and 12, is made or set up of the Work rest 30.

in permanent form and the same is true The jack itself is then made and assembled outside with the shafts 16 in position with their gears on them and the ends of these shafts are inserted down through the slots 14: which are wide enough to receive them and down into the recesses 13. The same assembly is made at the top. Then'the'rings 15 are inserted endwise-and pressed'in with any necessary degree of pressure so that they surround the ends of plication, but reserve the right to present thesubject matter of the same in a divi-i sional application.

Althoughl have illustratedand described only asingle'forinof the invention 1 am aware 5 of the fact that =modifications can i be made therein by any person skilled in the i =artwithout departing from the scope of the invention as expressed in the claims."

Therefore I do not wish to be limited to allthe details of construction herein shown and described, but what I do claim'is:

'1.- In a load lifting jack, the combination of a base having openings, shafts locatedin said openings, bearing members pressed into the openings andcarrying the shafts, said base 6 having slots along which the shafts can bemovedl into the openings in the absenceof the bearing members,'with a'lazy tongs'structure carried by said shafts.

2. In a load lifting-jack, the combination witlra-screw and arms constituting a lazy l tongs structure, of a structure comprising opposite Walls permanently connected togetlier provided with parallel slots having enlargements at their ends, shafts having means for connecting the lazy tongs ar'msi wlocated insaid enlargements and capable of passin'gthrough said slots thereto, and bearing'members for the shafts fittingin said enlargements and prevei'iting the removalof the Shafts. i

In a loadlitting jack, the' combinatioi'i with 'a'set: of arms constituting a lazy tongs construction, of opposite walls provided with slots having enlargements, transverse shafts having meansfor connecting the lazy tongs arms, their endsbeing locatedin said enlargements and capable of passing along said slots thereto, and bearing members for the shafts fitting in said enlargements and preventing the removal of the shafts along the-slots. 1

I. In a load lifting jack, of the lazy tongs type, the combination of four sets 'ofpivotally connected arms and means across the center for connecting two opposite pivots thereof, withtwo shafts havingmeans holding the arms fixed to their respective ends, two side walls permanently fixed together each having slots extending in-froin one edge wide enough to receive the circular ends of the shafts and circularenlargements at their ends, and rings fitting on the ends of the shafts and inserted in saidenlargements.

Ina load lifting jack of the lazytongs type, the combination of four sets of pivotally connected arms and a screwacross the i center connecting them, two tri'iiisverse shafts eaclrhaving anon-circular cross sec enough to receive the circular ends oft heshafts and circularenlargements at their y ends,- andbearingrings fitting on the ends of the shafts and insertedin said enlargements by forcing themin axially. i i p 6. In a load lifting jack, the combination with a screw and arms constituting a lazy tongsstructure, of a base having opposite wall s provlded with a pro ection 'extending beyond the wall on one side to prevent overments and; capable fofpassing through said slots tl1ereto,-' and bearing members for the shafts fitting in said enlargements and prewenting the removal ofthe shafts.

In testimony whereof I l1ave 'heren'nto" afiiXed-my signature.

AMO'SIRI'LANIER,

tion ,-f-sai'd arlns having perforations jofthef i same shape for receiving them so that they I are-fixed to their respective. shafts, the shafts having circular ends, twof'side w'alls permanently' fixed together each having slots extending in from one edge wide turningthe devicew-hen'turning the screw, said walls being provided with parallel slots having enlargements at 'tlieir"ends, shafts having means for connecting "the "lazy tongs arms located in said enlarge- 

